Improvement in scroll-sawing machines



SAMUEL IDE. Improvement in Scroll-Sawing Machines Patented May 28,18?2'.

- UNITED STATES ATENT OFFICE.

SAMUEL IDE, OF MEDINA, NEXV YORK.

IMPROVEMENT IN SCROLL-SAWING MACHINES.

Specification forming part of Letters Patent No. 127,241, dated May 28, 1872.

Specification describing a new andIm proved Scroll-Saw Cross-Head, invented by SAMUEL Inn, of Medina, in the county of Orleans and State of New York.

Figure 1 represents a front view of my improved scroll-saw head and connections. Fig. 2 is a vertical transverse section of the same on the line 0 c, Fig. 1. Fig. 3 is a horizontal inverted section on the line 70 k, Fig. 1. Fig. 4 is a detail sectional side view of the same.

Similar letters of reference indicate corresponding parts. i

This invention relates to a new coupling for the pitman and lower cross-head of a reciprocating saw, and to a novel connection of the saw and cross-head, and has for its object to facilitate the attachment and removal of the saw-blade, and insure a reliable joint for the upper end of the pitman where it is fastened to the cross-head. The invention consists, first, in a peculiar arrangement of the upper part of the cross-head for the reception of the saw; and, secondly, in the use of a thimble and conical screw connection for the pitman, as hereinafter more fully described.

A in. the drawing represents the crosshead of the saw-mill. B is the lower part of the saw, and (J the upper part of the pitman. Into the upper end of the saw-head is fitted and fastened, by bolts at a, a block,D, cross-slotted Vertically to the top, and provided with a vertical bore, 1), which leads from the lower end to the junction of the cross-slots, as is clearly shown in Fig. 4. Ahorizonta-l aperture, 61, leads also to the junction of the cross-slot, a V- shaped projection, 6, being on the block D, un-

der said aperture d. The [vertical bore 1) is made with a sharp-pointed tool, so it will be smaller at its upper end, as indicated in Figs. 2 and 4. The saw has projecting-pins ff at its lower part, the endsof said pins being rabbetcd to be narrow. The saw is applied to the block D by being first rested upon the projecting V e, and then introduced in the slot g, so that the pins f will enter through the aperture (l, and till they are in line with the transverse slot h. The saw is then raised, drawing the pins f into the narrow upper part of the bore b, so that their smaller ends will be guided and held in the slot it. Thus the required connection is established. The saw is easily detached by being drawn down and moved for ward, all of which can be done with one hand, and Without inconvenience of any kind. Through the upper part of the pitman (l is fitted a thimble, E, of cylindrical outer form, but whose bore i'ssomewhat enlarged at the ends. A bolt, 0', havin g a conical head and adapted to receive a conical nut, j, holds the pitman confined to a slotted transverse piece, l, of the cross-head, by fitting through land into the thimble, so that the conical head and conical nut will enter through the transverse piece into the thimble, in manner clearly shown. in Fig. 2. This connection is reliable and simple, and prevents the fastening-screw from working loose, as the greater part of the strain is transferred to the thimble.

Havingthus described my invention, I claim as new, and desire to secure by Letters Pat ent 1. The. block D having the cross-slot g h,

bore 12, opening d, and projection e, and applied to the cross-head of areciprocating saw, substantially as and for the purpose herein shown and described.

2, The combination of the thimble E, pitman 0, and cross-head A with the conicalheaded screwt' and conical nut j, as set forth.

SAMUEL IDE.

Witnesses:

ANDREW 000K, ALFRED IDE. 

